异形接头异形接头是套铣作业中连接钻柱与套铣管的专用接头。分普通异形接头和异形安全接头。AbnormityJointAbnormityJointisaspecializedjointconnectingdrillstringandwashoverpipeinthewashoveroperation.Itisdividedintoplainabnormityjointandabnormitysafetyjoint.异形接头和异形安全接头技术参数SpecificationofPlainProfiledJointandprofiledsafetyjoint型号Type上端外径O.D.ofUpperend(mm)上端螺纹Upperendthread下端双级螺纹LowerendTwo—stagethreadYJT146127NC385-3/4扁梯形短齿扣FJWPYJT194165NC507-5/8扁梯形短齿扣FJWPYJT206165NC508-1/8扁梯形短齿扣FJWPYJT219178NC508-5/8扁梯形短齿扣FJWPYJT24420365/8REG9-5/8扁梯形短齿扣FJWPYJT27320365/8REG10-3/4扁梯形短齿扣FJWP)